I need the name to get it. If you can tell me other books about pacts, I thank you.
EA doesn’t “teach” about making pacts in any of his books (as in, he doesn’t give step by step instructions).
However, The Book of Azazel is specifically about his pact with the grand demon, and goes into the history of pact making a bit, so it may be helpful.
He also covers pacts in the evocation course.